What's the problem with my car it won't start till like the 3rd time I crank it? on 1999 Cadillac Seville STS

Wen it cranks some times it turns off and makes pop on the ingean on the passenger side.

Asked by for the 1999 Cadillac Seville STS
2 answers
It sounds like a timing issue. Does what kind of ignition system does it have? Give more details' on model make...
poss fuel pump ck valve or fuel pressure regulator is bad. get diag and est to repair